Remove focus from a text input, button, etc.
Calls [blur](https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus) on the element.

Examples:

```js
I.blur('.text-area')
```
```js
//element `#product-tile` is focused
I.see('#add-to-cart-btn');
I.blur('#product-tile')
I.dontSee('#add-to-cart-btn');
```

@param {CodeceptJS.LocatorOrString} locator field located by label|name|CSS|XPath|strict locator.
@param {any} [options] Playwright only: [Additional options](https://playwright.dev/docs/api/class-locator#locator-blur) for available options object as 2nd argument.
@returns {void} automatically synchronized promise through #recorder
